Mixing machine



Jian. 30, 31923.

' R. EDMONDSON.

M|x|NG MAcHlNE FILED APR. 17, 1922.

INVENTOR Patented Jan. 30, 1923.

ROBERT EDMONDSON, OF ROCHESTER, NEW YORK.

MIXING MACHINE.

Application filed April 17, 1922. Serial No. 554,222.

To aZ whom t may concern.'

Be it known that I, Ronmrr EDMoNDsoN, av citizen of the United States, residing in Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Mixing Machines, of which the following is a speci cation. Y j l This invention relates to concrete mixing machines.

One object of the invention is to provide a concrete mixerthat may be easily and freely rotated to mix concrete material, and tilt it to discharge the mixed material therefrom in such a way that the drum will not be disengaged from the parts by which it is rotated.

Another object of the invention is to mount the mixing drum upon a swinging support, so that the drum and support may be swung together when it is necessary to empty the drum. A still further object of the invention is in making the mixing drum in two parts, the bottom part of thicker and heavier material, and the top part of thinner and stronger material. This will keep the greater part of the weight below the center, and keep the drum from being top-heavy.

)Vith the above and other objects in view, the present invention consists in the combination of parts more fully described and illustrated in drawings, it being understood that changes may be.l made in the form, proportions, size and minor details, without sacriicing any of the advantages of the invention.

In the drawing Figure 1 is a vertical sectional view of the invention.

In Figure 2 is an end elevationpshowing different portions of the drum in dotted lines.

The refe-rence numbers (l) and (2) designate standards. each provided with a bearing (3) and (4) on its upper end. adapted to'receive the corresponding'trunnions of the swinging cross har The swinging U-shaped cross bar is in one piece and is provided with a recess (7) in its upper face, with which communicatcs an opening (S) through the bottom of the. cross bar, to receive the journal stud, (9) ixedly secured to the bottom of the drum (10) in any suitable manner.

The journal stud (9) extends into the recess (7) and through a bearing fitted in the recess, comprising upper Vand lower parts, (11) and (12), and steel balls between at (13). The journal stud (9) extends through bearingsv and recess (7) and (8), in the cross bar and a thread is cut in lower end of stud (9), with a nut to hold journal stud in place at (14), whereby the drum has an easy and free rotation upon the swinging cross bar, regardless of whether the drum is in its normal position or swung downward, to provide for the rotation of the drum (10). I provide the same with an annular toothed rack (15) around the drum, which meshes with a pinion (16), carried at the inner end of a short shaft (17) extending through one of the ends of cross bar at on top of standard as shown in Figure 1. i

At theI other end of this shaft I provide a gear (18) to connect with any suitable driving means (not shown) to rotate the shaft and the drum through the rack and pinion connections (15) and (16) and (17) and (18) respectively. Thus the drum may be rotated on its axis (9).

The mixing drum (10) is concave and is in two parts, open at the top, joined together at (1.9) by bolts at (20). The lower part (21) is made of thicker and heavier material. The upper part (22) of lighter and stronger material. The object is to have the greater weight at the bottom, so that the drinn will not be top-heavy.

Triangular shaped ridges extend vertically on the inside of the drum at (23) from a short distance from the bottom of the drum to a short distance from the top at and (25).

The object in not placing ridges even with the top of drum is, when the. drum revolves they would cast the mixing material out of the drum.

The mixing drum (l0) when loaded and mixing revolves at an angle of titty degrees (50") as shown in Figure in dotted lines. If the inside of the drum where smooth the material, if wet. would not turn over buty (5) througli'its bearings (4). at top of standard (2) by a gear at (26) and worm at (27).

Said worm gear,A and (27) may be connectedy to any suitable power (not shown); by giving a number of turns of this Worm gear to right .or left the swinging cross bar will raise theI bottom of they drum far enough to allow the mixing material to slide out of drum..

What I claim is:

1. A combination in a mixing machine comprisingr a body having a cylindrical upper portion and a redbuced vclosed bottom portion with longitudinal ridges mounted upon the inner surface of said cylindrical portion and projecting into said bottom portion, a tilting substantially U-shaped Cross bar in which said mixer is rotatably journaled, standards in which the end por- ROBERT EDMO'NDSON.

Witnesses CHAs.' O'rrs, L. A.y SMITH. 

